Peru captain Paolo Guerrero will miss the World Cup in Russian Federation after his doping ban, which had just expired, was increased from six to 14 months, the Court of Arbitration for Sport (CAS) said on Monday.
The footballer's ban lapsed this month, but on Monday (NZT Tuesday) the court ruled Guerrero would now serve a 14 months suspension - an "appropriate sanction in light of Mr Guerrero's degree of fault".
However, after the suspension ended on May 3, Federation Internationale de Football Association and the World Anti-Doping Agency (WADA) called on the CAS to extend the ban on the captain and top scorer of the Peruvian national team for one more year.
Last October the player tested positive for benzoylecgonine, which is a metabolite of cocaine.
Wada wanted the suspension to be increased to two years, but Guerrero also appealed in the hope it would be annulled.
Guerrero's appeal against the ban was upheld.
It is the second ruling from sport's highest court that has weighed heavily on Peru's first World Cup appearance in 36 years.
Guerrero had also filed a case to CAS in an effort to be absolved of the original sanction, which ended this month.
The 34-year-old was set to captain Peru at its first World Cup appearance since 1982.
The FPF said in a statement that it "profoundly regrets the lengthening of the ban imposed on our player Paolo Guerrero who has always shown exemplary conduct".
CAS accepted he did not intend to enhance his performance but ruled that Guerrero bore "some fault or negligence, even if it was not significant".
Peru are in Group C of the Russia World Cup, together with France, Denmark and Australia.
"Two arbitration procedures were registered by the CAS which were consolidated and referred to the same Panel of arbitrators who held a hearing with the parties at the CAS Headquarters in Lausanne on 3 May 2018".